Add 70/20 and 25/45
1st number: 3 10/20, 2nd number: 25/45
70/20 + 25/45 is 73/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
70/20 = 70 × 9/20 × 9 = 630/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
25/45 = 25 × 4/45 × 4 = 100/180 - Add the two like fractions:
630/180 + 100/180 = 630 + 100/180 = 730/180 - 730/180 simplified gives 73/18
- So, 70/20 + 25/45 = 73/18
In mixed form: 41/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/20+50/45 70/40+25/45 70/20+25/90 70/20+75/45 70/60+25/45